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		几何尺寸与公差论坛------致力于产品几何量公差标准GD&T (GDT:ASME)\|New GPS(ISO)研究/CAD设计/CAM加工/CMM测量 » 仿射空间：CAX软件开发（三）二次开发与程序设计 » CAD二次开发 » SolidWorks二次开发
Dear Robin,do you think that isClosed value should be Zero for a partial circle?

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2007-05-20, 09:51 AM	#1
yogy 高级会员注册日期: 06-11 帖子: 1527 精华: 15 现金: 6353 标准币资产: 6353 标准币	Dear Robin,do you think that isClosed value should be Zero for a partial circle? Q: Subject: Dear Robin,do you think that isClosed value should be Zero for a partial circle? Dear Robin, When I try to get the following parameters (shown in red font, such as m_min_t, m_max_t, isClosed, isPeriodic) from partial curve in Sketch, I get the incorrect result for the parameters. For example, for a partial circle, I get the incorrect result of the parameters as follows. m_min_t = 0; m_max_t = 6.28; isClosed = 1; isLPeriodic = 1; I think that isClosed value should be Zero for a partial circle. Do you? The source file is attached in the Email. My code is as follows. ISketchSegment swSketchSegment(dSketchSegment); dSegmentCurve = swSketchSegment.GetCurve(); if (dSegmentCurve != NULL) { int isPeriodic, isClosed; ICurve swCurve(dSegmentCurve); swCurve.GetEndParams (&m_min_t, &m_max_t, &isClosed, &isPeriodic); swCurve.DetachDispatch(); } Yogy

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2007-05-20, 09:52 AM	#2
yogy 高级会员注册日期: 06-11 帖子: 1527 精华: 15 现金: 6353 标准币资产: 6353 标准币	回复: Dear Robin,do you think that isClosed value should be Zero for a partial circle? R: Yogy, The parametric range is the valid range for the curve. If the curve is infinite (such as a line), then the parametric maximum is the largest permissible value in the parametric space. Use Edge::GetCurveParams2 to determine if a circular edge is a complete circle or an arc. Also, you may need to create a TrimmedCurve before getting the parameters. Robin Richter

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